Window fastener



G. H. LUNEBURG 1,938,258

WINDOW 'FASTENER Filed Dec. 5, 1932 look that can be actuated from the interior.

Patented Dec. 5, 1933 UNITED STATES PATENT OFFICE 3 Claim.

This invention relates to improvements in window sash looks or fasteners.

More particularly, the invention has for its primary object the provisions of a storm window A further object is to provide a window sash lock of comparatively'few parts of simple design which, when assembled, constitute a device of sturdy construction and not apt to break or be accidentally rendered inoperative.

With theseand other objects in view, the invention consists in certain details of construction and combinations and arrangements of parts, all as will hereinafter be more fully described and the novel features thereof particularly pointed out in the appended claims.

In the accompanying drawing,

Figure 1 is an elevational view, looking at the inner surface of the bottom of an upper window sash;

Fig. 2 is a plan view of the structure shown in Fig. 1, the window pane being shown in section;

Fig. 3 is a sectional view on the line 3-3 of Fig. 2;

Fig. 4 is a Fig. 2;

Fig. 5 is a detail, perspective view of the locking lug; and I Fig. 6 is a like view of the latch.

The lower cross piece of an upper window sash is illustrated at 10 and that portion of the structure to which said sash is to be locked, for instance, a sill or the upper cross member of a lower sash, is shown at 11. Cross piece 10 has mounted thereon a lug 12 in whose upper face there is a recess 13, in which a latch 14 is adapted to engage when the upper sash is in position to be locked. The latch 14 and the catch 15 for locking the same, are mounted on the structural element 11.

Preferably, latch 14 and catch 15 are carried on a base plate 16, attached to element 11 and provided with a pair of bearings 17 for trunnions on one end of latch 14. The intermediate portion of said latch is offset as at 18, with the offset portion of reduced width so as to engage in recess 13 as shown in Figs. 1 to 3. The free end of latch 14 is formed with a slot 19 through which the catch 15 may project. Catch 15 is of yoke or U-shape at its upper porsimilar view on the line of tion and its lower portion constitutes a spindle 20 which is swiveled in plate 16.

The window is illustrated in its locked position, but as will be understood, by giving the catch a one-quarter turn, the yoke portionwill coincide with the slot 19, whereupon the latch may be swung upwardly on its pivot to clear lug 12 and unlock the window. From the foregoing, it will be seen that a storm window may be easily locked from the inside and that the present device is not likely to be broken or become inoperative. Also, the several parts are of simple form, whereby they may be produced at a minimum cost.

What I claim is:

'1. In a window sash lock, the combination of a lug adapted to be secured to said sash, a plate mounted on that portion of the structure to which the sash is to be locked, a latch pivoted on said plate movable into position over said lug when the sash is in locking position, and a catch swiveled on said plate engageable with said latch to lock said latch over said lug, said latch engaging said lug at a point intermediate said catch and the pivotal center of the latch.

2. In a window sash lock, the combination of a recessed lug on the sash, a latch pivoted on a portion of the structure to which the sash is to be locked, said latch being movable into the recess in the lug when the sash is in locking position, and a catch swiveled on said structural portion for locking said latch in said recess, said latch engaging said lug at a point intermediate said catch and the pivotal center of the latch.

3. In a window sash lock, the combination of a recessed lug on said sash, a plate mounted on that portion of the structure to which the sash is to be looked, a latch pivoted on said plate and swingable into the recess in said lug when the sash is in locking position, said latch having a recess therein, and a catch pivoted in said plate and projecting through the recessed portion of the latch for locking said latch in said recess, said latch engaging said lug at a point intermediate said catch and the pivotal center of the latch.

GUSTAVE H. LUNEBURG. 

